NMR signal observed on oscilloscope (H-nuclei)
Lissajous figure
Block diagram of controller Circuit
Features
11 easy-to-use specimens in micropipette tubes
Highly homogeneous magnetic field to assure more coda waves
Open magnet structure for easy specimen access
High SNR & stable frequency
One specimen contains both H & F nuclei for determining the g-factor of F-nuclei
High accuracy milli-teslameter and frequency meter included
Introduction
This LEAI-11A experimental system of continuous-wave nuclear magnetic resonance (CW-NMR) consists of a high homogeneity magnet and a controller unit. The marginal oscillator is separated from the electric unit and mounted on a scaled rail. It can be conveniently adjusted and positioned in the magnetic field. It is an ideal experimental instrument for advanced physics laboratories.
The instruction manual contains comprehensive materials including experimental configurations, principles and step-by-step instructions. Please click Experiment Theory and Contents to find more information about this apparatus.
Using this instrument, the following experiments can be performed:
1. Observe NMR phenomenon of H- and F-nuclei.
2. Determine parameters of gyromagnetic ratio, g-factor and nuclear magnetic moment.
3. Observe the influence of magnetic field homogeneity on signal coda wave using different specimens.
4. Measure magnetic field, and learn how to calibrate Teslameter through NMR method.
Specifications
| Description | Specifications |
| Types of nuclei | H and F |
| SNR | > 40 dB (H nucleus) |
| Oscillator frequency | 17 MHz to 23 MHz, continuously adjustable |
| Magnet pole | diameter: 100 mm; spacing: 20 mm |
| Power source of sweep field | 0 ~ 5 V, 50/60 Hz |
| NMR signal amplitude (peak to peak) | > 4 V (H-nuclei); > 100 mV (F-nuclei) |
| Homogeneity of magnetic field | better than 8 ppm |
| Probe moving range | 5 ~ 15 cm |
| Phase shifter | 50 Hz sine wave, > 90° |
| Number of coda waves | > 10 (H nucleus) |
| Teslameter | measurement range 0 ~ 2000.0 mT, resolution 0.1 mT |
Parts List
| Description | Qty |
| Main Electric Unit | 1 |
| Electromagnet with Rail & Marginal Oscillator | 1 |
| Power Cord | 1 |
| BNC Cable | 3 |
| Connection Wires | 2 |
| Tesla Probe | 1 |
Specimens in Micropipette Tubes (Contained in a wood box) | 11 (CuSO4 Solution, CuSO4(1%, 2%, 3%, 4% & 5%), Fe2Cl3 Solution, HF Acid, Glycerol, Pure Water, Polytetrafluoroethylene) |
| Frequency Meter | 1 |
| Instructional Manual | 1 |
NMR signal observed on oscilloscope (H-nuclei)
Lissajous figure
Block diagram of controller Circuit
